Stored Cross-Site Scripting (XSS) in Threat Intelligence rules in Guardian/CMC before 22.6.2

Last update: 2024-05-20

Advisory IDNN-2023:4-01
TopicStored Cross-Site Scripting (XSS) in Threat Intelligence rules in Guardian/CMC before 22.6.2
CWE ImpactCWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Issue date2023-08-09
AffectsGuardian, CMC < v22.6.2
CVE Name(s)CVE-2023-22843
CVSS Score7.3 (CVSS v4.0)
6.4 (CVSS v3.1)
CVE Risk LevelHigh (CVSS v4.0)
Medium (CVSS v3.1)
Risk Level for Nozomi customersLow


An authenticated attacker with administrative access to the appliance can inject malicious JavaScript code inside the definition of a Threat Intelligence rule, that will later be executed by another legitimate user viewing the details of such a rule.


An attacker may be able to perform unauthorized actions on behalf of legitimate users. JavaScript injection was possible in the content for Yara rules, while limited HTML injection has been proven for packet and STYX rules. The injected code will be executed in the context of the authenticated victim's session.

Affected Products

Guardian, CMC < v22.6.2

Workarounds and Mitigations

Use internal firewall features to limit access to the web management interface.


Upgrade to v22.6.2 or later.

Modification History

2023-08-09: Initial revision
2023-09-04: Minor updates to format and metadata to improve the CSAF implementation
2023-11-13: Migrated to CSAF VEX format
2023-11-16: CSAF vers improvements
2024-05-20: Added CVSS v4.0 scoring where applicable

Related Links


We thank the following parties for their efforts:

  • Stefano Libero of Nozomi Networks Product Security team for finding this issue during a scheduled internal VAPT testing session


Nozomi Networks Product Security team can be reached at prodsec@nozominetworks.com.
More contact details on the PSIRT page.